Grinding machine



1 l9 June 4, 27 H LUTZ GRINDING MACHINE Filed Oct. 27, 1919 6 Sheets-sheet [M TOR Ham Lutz A T ORNEy June 14, 19 2 7. 1,632,379

H. LUTZ GRINDING momma Filed Oct. 27, 1919 6 sheets-sheet 2 0 INVENTOR.

I76 Lutz ATTORNEY June 14, 1927. '1','63'Z,379 H. LUTZ GRINDING momma Filed Oct. 27, 1919 6 sheets-sheet 3 Wr////////////// I v 7 Elm...

IW4II/IQ/If /fl///////////////// ///v//////////////////// //AMVA INVENTOR. Hana L 11 t5 ATTORMQL 2. v 5 w W.

June 14, 1927. 1,632,379

- H. LUTZ enmpme mcnxrm Filed Oct. 27, 1919 6 heets-Sheet 4 INVENTOR.

Hana Lutz ATTORNEY 1,632,379 H. LUTZ GRINDING MACHINE June 14', 1927.

Filed Oct. 27, 1919 6 sheets-sheet 5 qa 5 1 f1 WW,- xxx 77 mm (2 mI q- /0 I 74 1 i 1 q L [61/62 704 I 1 III nvmvron m Hand Lutz ATTORNEY June i4 1927. 1,632,379 I 4 H. LUTZ GRINDING momma Filed Oct. 27, 1919 6 eets-Sheet 6 no 3 05 1 i a I Q Hltlmmm 5 :FLQ /4----kmmvron. Hana Lutz {BY ,1] I! ATTORNEY Patented June 14, 1927.

HANS LUTZ, OF ELIVIIRA, NEW YORK, AS

TO THE VIILLYS-OVERLAND GOMF PANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

. f GRINDING MACHINE.

Application filed October 27, 1919. Serial No. 333,766.

lvlv invention relates to a grinding machine and has for its QbJcct toprovide more particularly an improved machine tor grindion; or finishing ball bearing races and themounted opposite theroto,'the shaft being mounted in such a manner as to prevent flexinn thereof during operation which might cause the tool carried thereby to change its position or vibrate upon the ork piece.

Another object of the invention is to provide improved means for scillating awork holder carrying a Work piece in position to. be engaged by a suitable tool during the oscillatory movement of: the holder.

rinother object of the invention is to provide a relatively fixed rotatable grinder in con'ihination with an oscillatory Work holder adapted to be simultaneously oscillated and rotated upon which may be supported a ball race or similar work piece in such a manner as to grind a curvilinear groove upon the work piece.

To these and other ends the invention comprises certain novel features of construction and arrangement of parts as will be hereinafter more fully pointed out and claimed, it being understood that the invention is susceptible to various modifications without departing; from the spirit of the invention as comprehended. by the claims appended hereunto. v a r A, structure constituting one embodiment of my invention is illustrated in the accompanying drawings forming a part of this specification in Which: I

Figure I is a plan view of a machine embodying; the invention.

Figure ll isan end elevation of the same.

Figure Ill is a sectional elevation taken on lines llllll of Figure H.

Figure i is an enlarged sectional plan taken on lines lV--;lV o't l igurelll.

Figure V is a transverse section taken on lines V V of Figures HI and IV.

Figure VI is an enlarged fragmentary sectional plan through the work holder with the grinding tool shown in engagement with the curvilinear groove of a ball bearing race, the extreme position oi": the Work holder be in indicated in one case by full lines and in the other'by dotted lines. a

Figure Vll is a fragmentary end elevation of a portion of the means for efiecting the oscillation of the Work holder.

Figure VIII is a sectional elevation taken on line VlllI-VHI of Figure VII and also oi? Figure IX.

Figure TX is a sectional plan taken on line lX lX of Figures III and VII.-

l igure X is a sectional elevation taken on line hi -X of Fi 'ure IX.

Figure X1 is a sectional elevation taken on line XI-XI of Figure IX.

Figure Xll'is an enlarged sectional elevation taken on line XII-XII of "Figme Ill, and r Figure XIII is' a fragmentary sectional plan taken on line XIII-XIII of Figure III. I

Like reference characters refer to similar parts throughout the several views of the drawing.

In the present invention I have designed a machine Which is particularly adapted for holding and oscillating a Work piece, such as a ball bearing race, which is both rotated and oscillated simultaneously, with an improved mounting for a grinding tool adapted to be rotated in engagement with the race to erm therein the ball bearing; groove, the grindingtool being relatively fixed With respect to the Work holderand being mounted in such a Way that it may be rotated with out vibration in order that a more perfect seat for. the hall may he formed Within the race. y

Vihile the invention is particularly adapted for grinding ball bearing races, it will be understood that any suitable tool may be sed in place of a grinder and that Work pieces of various kinds may be operated upon and further that the machinemay be used as a lathe if desired by discontinuing the operation of the mechanism provided tor e'ti'ecting oscillation oi the Work holder,

Lil

.cillation of the carriage and'the work holder thereon, the slide 12 is preferably provided with a downwardly extending ,sleeve or bea'ringfis projecting through and movable in a longitudinal slotin the bed 11 of the base 10 as shown in Figures III and K111. A shaft 06 for actuating the work support ing carriage is journaled in the bearing 64 and is keyed upon'the turn-table 16 as indicated at 67 in Figure Ill. The shaft 66 is held against longitudinal displacement upon the bearing 64 by means of a nut 68; and the lock nuts 69 upon the threaded portion 70 of said shaft. A bracket 71 is supported beneath the bed 11, preferably upon the bearing sleeve 64 of the slide 12 which bracket carries at its upper end a sleeve 7 surrounding the bearing sleeve 64 with which it is rigidly connected in any suitable manner such as set screw 64. The bracket 71 is provided with a depending portion 73 upon which is mounted in suitable ways a slide 'i'l'having at its ends transversely eX- tending lugs 75 arranged to slide upon the vertically disposed plate portion 76 of the brackets as indicated in Figures VII and TX. The shaft 66 is provided at its lower end with a reduced'portion 77 adapted to receive a disc 78 at a point opposite the slide 74 as indicated in Figure III. The

disc 78 is provided at one side with a recess in which is disposed the outer ends of the upper and lower steel tapes79 shown in Figure XI, and likewise the intermediate tape 80, all of which are clamped upon the disc by means of the block 81 held upon the disc by the screws 82 as shown in Figures IX and VII. The opposite'ends of the tapes 9 are connected with a head 8?) as indicated at 84- in Figure XL said head being adjustable in a recess 85 in one of the'lugs 75 of the slide 73, the adjustment being effected by means of a threaded extension 86 extend ing through said lug and provided on the outside thereof with the nuts 87. be intermediate tape 80 has its inner end anchored in a slotted head 88 by means of the bolts or rivets 89 as indicated in Figures IX and 211, said headbeing adjustable in a recess 90 in the lug 75 at the right hand side of the bracket the adjustment. being effected by means of the threaded extension 91 on the head extending through said lug and secured by means of the nuts 92. The adjustable heads 83 and SSare provided for the purpose of properly tensioning the steel tapes connected therewith which are wound in opposite directions upon the disc 7 8. The central portion of the plate 76 of the bracket- 71 is cutaway as indicated at 93 to permit the disc"? 8 to be brought into close proXim ity to the slide 74 as indicated in Figure 111. The slide 7 1 is provided on the opposite sides of its center with the longitudinally extending slots 9 1 in which are mounted, blocks 95 having heads 96 movable in the groove 97 formed in the slide -as indicated in FigureslXand XI The blocks 95 are adjustable in theislots 9% by means of the screws 98 extendingthrough the lugs 75 of the slideas indicated in Figure TX. A shaft 99 is screwed into each of the lugs 95, said shaft being provided with rollers 100 secured by washers 101 which are held against displacement by means of the cotter pins 102 extending through the outer ends of" the shafts. Mounted between the rollers and in engagementtherewith is a heartshaped cam 1'03 carried on the inner end of the shaft 104 journaled in a bearing 105 supported by the vertically dis'posed ribs 106 of the bracket '71 as shown in Figures llliand X111. 'Theouterend of the shaft 10 1 is provided with a sprocket 107 carrying a chain 108 connected fwith a smaller sprocket109 on a shaft 110 ournaled 1n bearings 111 carried by the exten-s ion lg of the base 10 as indicated in Figure III; The shaft 110 provided at itsouterend with a a pulley 112 adapted tobe 'dri jven by a belt 113 connected with any suitablesource of power. The chain or flexible conncction108 between the sprockets 107 and 109 permits of the shifting ofthe bracket 71 within certain limits when the slide 12 is moved upon the bed 11 from one position to another. It will be seen fron'r-ll igureIH that'separate and independent means have been provided for'operati-ng the work holder and-the tool holder and for oscillating-the carnage upon which the work 'holder is mountech but it will be understood that If desired the-tool holding shaft may be driven by the'same means provided for effecting rotation of the 17 the desired amount upon the table 16.

After the standard and slide17 have each been clamped in their proper P05111011 of ad ustment so that the tool will engage the work piece at the desired point, rotation of the pulleys 27 and 18 is then effected by means of the bolts 28 and 419 respectively. At the same time the shaft 110 is rotated by means of the pulley 112 and belt 113, thereby etfecting rotation of the'shaft 10'' through the flexible connection 108". Rotation oft-he shaft 104 effects rotation of the cam 103 thereon and by rotationof the carn reeipncs [cation of the slide 'l'l is effected by reason connected with the shaft 66 effects oscillation of the same, whereby the turn-table 16 on the circular traek 15 and the parts superimposed upon the table are also oscillated. The work holder is therefore both rotated andoscillated at the sametime thatthe tool is beingrotatedin contact with the work. The work holder is preferably oscillated through an angle of 90 degrees as indicated in Figure VI. The oscillation of the work holder is particularly advantageous in oases where it 'is desired to grind a curvilinear groove in the work piece as in the case of a ballbearing race such asis indicated in FigureVL This method may also be employed in grinding or producing grooves in other forms of work, and by using the proper chuck, the grinding tool may be made to operate either interiorly orexteriorly of the work. I

While I have used the term grinder in the claims and specification, it will be unden stood that I do not employ it in a limited sense, since any suitable tool may be used according to thecharacter of the work to be performed i q hat I claim as new and desire to secure Letters Patent is a 1, In a machine of the class described, the

combination of a base, an adjustable slide upon said base having a circular track there- 'on, means for locking said slide in different 'ciprocated, oscillation of said shaft and said carriage will be effected.

2. In a machine of the class described, the combination of a base, a circular track adjustable thereon, means for locking said track in different positions of adjustment, a carriage mounted for oscillation upon said trackfa work holder upon said carriage, a shaft journaled upon said track and connected with said carriage, a bracket connected with said track, a slide reciprocably mounted upon said bracket, means for reciprocating the same, nieansconnecting said shaft with said slide whereby when the latter is reciprocated oscillation of said shaft and said carriage will be effected, and a tool holder adapted to support a tool in engagement with a workpiece carried by, said work holder during oscillation of the same. Y

3. In a machine of the class described, the centibination of a base, a circular track adjustable thereon, means for locking said track in different positions of adjustment,

a carriage moumed for oscillation upon said track; a work liolderupon said carriage, a shaft journalcd upon said track and connected with said carriage, a bracket connected with said track, a slide re'ciprocably mounted upon said bracket, a shaft jour holder thereon, means for actuating the second mentioned shaft, and a. rotatable tool holder adapted to support a tool in engagement with the w rk piece carried by said work holder during oscillation of the same.

- 4.- In a machine of the class described, the

combination of a base, a c-ircularftrack adjustable thereon and having a sleeve at one side thereof, a shaft journaled in said sleeve, a carriage upon said-track connected with said shaft, a work holder upon said carriage, a bracket having an annular por 1 tion engaging said sleeve, aslide upon said bracket, means interposed between said slide and said shaft for oscillating the latter upon reciprocation of the slide, a shaft journaled in said bracket,ymeans actuated by said last mentioned shaft for reciprocatingsaid slide, means serving to effect operation of the secv,ond mentioned shaft in any position of adustment of said track, and a tool holder adapted tohsupport a tool in engagement with a work piece carried by said work holder during oscillation of the same;

5.111, a machine of the class described,

the combination of a base, a circular track thereon having a sleeve at one side thereof,

carriage upon said track, a work holder upon said carriage, a shaft having one end connected with said carriage and extending through and journaled in said sleeve, a locking member for holding said shaft againstlongitudinal displacement, a bracket secured uponsaidsleeve, a slide upon said bracket, a discupon said shaft, flexible connections between said disc and said slide whereby upon movement of said slide in opposite directions oscillation of said shaft will be effected, spaced rollers connected with said slide, a second shaft carried by said bracket, a cam connected with said second mentioned shaft and extending between and in engagement with said rollers, means for actuating the second mentioned shaft, and means for supporting a tool opposite said work holden 6, a machine of the class the combination of a base, a circular track thereon, a carriage mounted for oscillation upon said track and having a sleeve at one side thereof, a work holder upon said carriage, a shaft journaled in said sleeve having one end connected with said carriage and the other end projecting beyond the sleeve, means for preventing longitudinal displacement of said shaft, disc secured upon the projecting end of said shaft. a bracket connected with said sleeve, a slide upon said bracket, flexible members Wound in opposite directions upon said disc, means for adjustably connecting the outer ends of said flexible members with said slide, spaced rollers adjustably mounted upon said slide, a cam mounted between said rollers, means for rotating said cam, and means for supporting a tool in position to engage a work piece carried by said holder.

7. in a machine of the class described, the combination oi a base, a circular track thereon, a carriage upon said track, a work holder upon said carriage, a shaft journaled upon said track and operatively connected with said carria 'e a bracket carried b I the track a slide upon said bracket, adjustable flexible connections between said slide and said shaft whereby when the slide is reciproca-ted oscillation of said shaft will be offseted, means for reciprocating said slide, and means for supporting a tool in position to engage a work piece carried by said holder.

8. In a. machine of the class described, the combination of. a base, a circular track thereon, a carriage upon said track, a workholder upon said carriage, a shaft operatively con nected with said carriage and journaled in a bearing upon said track, a bracket 1nounted adjacent said carriage, a slide mounted upon said bracket, flexible connections between said slide and said shaft for oscillating the latter upon reciprocation of the slide, adjustable blocks mounted in recesses formed in said slide, rollers carried by said blocks, a cam mounted between said rollers, means for actuating said cam to effect recip-r rocation of said slide, and means for sup porting a tool in position to engage work piece carried by said holder during oscillation of said carriage.

In testimony whereof, I aflix my signature.

HANS LUTZ.

H. MARCUS June' 14, 1927,

BIRD CAGE Filed Nov.20; 1926 2] no m4 6 o z E4504. 1/45005. 

